1/* $Id: dba_array.c,v 1.2 2020/06/22 19:20:40 schwarze Exp $ */ 2/* 3 * Copyright (c) 2016 Ingo Schwarze <schwarze@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 * 17 * Allocation-based arrays for the mandoc database, for read-write access. 18 * The interface is defined in "dba_array.h". 19 */ 20#include "config.h" 21 22#include <assert.h> 23#include <stdint.h> 24#include <stdlib.h> 25#include <string.h> 26 27#include "mandoc_aux.h" 28#include "dba_write.h" 29#include "dba_array.h" 30 31struct dba_array { 32 void **ep; /* Array of entries. */ 33 int32_t *em; /* Array of map positions. */ 34 int flags; 35 int32_t ea; /* Entries allocated. */ 36 int32_t eu; /* Entries used (including deleted). */ 37 int32_t ed; /* Entries deleted. */ 38 int32_t ec; /* Currently active entry. */ 39 int32_t pos; /* Map position of this array. */ 40}; 41 42 43struct dba_array * 44dba_array_new(int32_t ea, int flags) 45{ 46 struct dba_array *array; 47 48 assert(ea > 0); 49 array = mandoc_malloc(sizeof(*array)); 50 array->ep = mandoc_reallocarray(NULL, ea, sizeof(*array->ep)); 51 array->em = mandoc_reallocarray(NULL, ea, sizeof(*array->em)); 52 array->ea = ea; 53 array->eu = 0; 54 array->ed = 0; 55 array->ec = 0; 56 array->flags = flags; 57 array->pos = 0; 58 return array; 59} 60 61void 62dba_array_free(struct dba_array *array) 63{ 64 int32_t ie; 65 66 if (array == NULL) 67 return; 68 if (array->flags & DBA_STR) 69 for (ie = 0; ie < array->eu; ie++) 70 free(array->ep[ie]); 71 free(array->ep); 72 free(array->em); 73 free(array); 74} 75 76void 77dba_array_set(struct dba_array *array, int32_t ie, void *entry) 78{ 79 assert(ie >= 0); 80 assert(ie < array->ea); 81 assert(ie <= array->eu); 82 if (ie == array->eu) 83 array->eu++; 84 if (array->flags & DBA_STR) 85 entry = mandoc_strdup(entry); 86 array->ep[ie] = entry; 87 array->em[ie] = 0; 88} 89 90void 91dba_array_add(struct dba_array *array, void *entry) 92{ 93 if (array->eu == array->ea) { 94 assert(array->flags & DBA_GROW); 95 array->ep = mandoc_reallocarray(array->ep, 96 2, sizeof(*array->ep) * array->ea); 97 array->em = mandoc_reallocarray(array->em, 98 2, sizeof(*array->em) * array->ea); 99 array->ea *= 2; 100 } 101 dba_array_set(array, array->eu, entry); 102} 103 104void * 105dba_array_get(struct dba_array *array, int32_t ie) 106{ 107 if (ie < 0 || ie >= array->eu || array->em[ie] == -1) 108 return NULL; 109 return array->ep[ie]; 110} 111 112void 113dba_array_start(struct dba_array *array) 114{ 115 array->ec = array->eu; 116} 117 118void * 119dba_array_next(struct dba_array *array) 120{ 121 if (array->ec < array->eu) 122 array->ec++; 123 else 124 array->ec = 0; 125 while (array->ec < array->eu && array->em[array->ec] == -1) 126 array->ec++; 127 return array->ec < array->eu ? array->ep[array->ec] : NULL; 128} 129 130void 131dba_array_del(struct dba_array *array) 132{ 133 if (array->ec < array->eu && array->em[array->ec] != -1) { 134 array->em[array->ec] = -1; 135 array->ed++; 136 } 137} 138 139void 140dba_array_undel(struct dba_array *array) 141{ 142 memset(array->em, 0, sizeof(*array->em) * array->eu); 143} 144 145void 146dba_array_setpos(struct dba_array *array, int32_t ie, int32_t pos) 147{ 148 array->em[ie] = pos; 149} 150 151int32_t 152dba_array_getpos(struct dba_array *array) 153{ 154 return array->pos; 155} 156 157void 158dba_array_sort(struct dba_array *array, dba_compare_func func) 159{ 160 assert(array->ed == 0); 161 qsort(array->ep, array->eu, sizeof(*array->ep), func); 162} 163 164int32_t 165dba_array_writelen(struct dba_array *array, int32_t nmemb) 166{ 167 dba_int_write(array->eu - array->ed); 168 return dba_skip(nmemb, array->eu - array->ed); 169} 170 171void 172dba_array_writepos(struct dba_array *array) 173{ 174 int32_t ie; 175 176 array->pos = dba_tell(); 177 for (ie = 0; ie < array->eu; ie++) 178 if (array->em[ie] != -1) 179 dba_int_write(array->em[ie]); 180} 181 182void 183dba_array_writelst(struct dba_array *array) 184{ 185 const char *str; 186 187 dba_array_FOREACH(array, str) 188 dba_str_write(str); 189 dba_char_write('\0'); 190} 191